Getting the right 120hz monitor helps... I have several 27" displays (two IPS I use for work, a standard TN 60hz that I use for my NAS server and my gaming 27" which is 120hz).

FPS games are night and day between IPS and 120hz. As noted above, you need to actually get sustainable frame rates to benefit from it but if you do, it's significantly smoother than anything you will see on an IPS panel. Factor in motion blur, mouse input lag and it becomes an easier choice.

If however, FPS games are not the primary use for the monitor, then you will likely be better off with a decent IPS panel.

Although with that said, my 27" Samsung 120hz has the best color reproduction that I have ever seen on a non IPS panel and comes very close to my other monitors.

I honestly don't know which to get... in terms of the 27", it's not necessarily the fact that it's IPS that gets me, it's the resolution and the fact that in general, the color reproduction is a bit better than most 120hz displays.

I've got $250 saved already to go towards whatever I get, and my cost on an Apple Cinema Display is only $750, so those have to be factored in as well. I just love the idea of 1440p AND the idea of 120hz.

Here's a question, my games are rarely pegged at 120fps, but they're never below about 85... does varying framerates between 85-120 on a 120hz monitor cause jerkiness or anything bad? or is it just varying levels of buttery smoothness?

Edit : everything over 60fps will make a differance with 120hz.... so 85 on 120hz is better than 120fps on 60hz. And 100fps is better than 85fps obviously. 55fps on 120hz is not as good as 60fps on 60hz. Hope that helpsEdited by UNOE - 1/29/12 at 6:11pm

Argh, I'm having the same issue, I can't decide between IPS or TN. I play a lot of BF3/MW3/Skyrim, Skyrim makes my eyes hurt on my rubbish Vestel 26", it's fine with FPS's. To be honest, I don't need a monitor upgrade, but I REALLY want to see what 3D is all about, and I rarely hit 120 fps with my single GTX 580 phantom. So, I don't think I will benefit from a 120hz monitor if that is the case, and settling for the LG D2342P-PN is the cheapest most viable option.

I'm ever so tempted by the S27A950D, or the S23A950D or the 750D versions.

This is so irritating, 1440P may benefit though, with my extra VRAM... Hmmm!

if you are a gamer you want 120hz..especially for fps games. Samsung S27A750D or S23A750D are the best monitors imho. I also have a 1200p IPS...i like the screen size and ratio on it better (web/work)....but 120hz for gaming is too good. I wish they made 24" 16:10 120hz monitors....23" 1080p is just a tad bit to small imo... =/

O well...for now I dual screen with 120hz and IPS...best of both worlds.Edited by malikq86 - 2/2/12 at 8:58pm

FPS games are night and day between IPS and 120hz. As noted above, you need to actually get sustainable frame rates to benefit from it but if you do, it's significantly smoother than anything you will see on an IPS panel. Factor in motion blur, mouse input lag and it becomes an easier choice.
If however, FPS games are not the primary use for the monitor, then you will likely be better off with a decent IPS panel.